ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A1

DTC Code DTC Name
C13A1 Short Circuit in Power Source Circuit

DESCRIPTION

C13A1 is stored if the power supply relay in the parking brake ECU assembly has a short circuit.

C13A1 is stored if the power switch is off and a voltage of 2.5 V or higher is applied to the IG terminal and an electric parking brake switch assembly malfunction or wire harness malfunction between the switch and ECU occurs.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13A1 Short Circuit in Power Source Circuit

  • Diagnosis Condition:

    Electric parking brake switch assembly is operated to lock side with power switch off or power switch is turned on (IG)

  • Malfunction Status:

    Short in parking brake ECU assembly internal power source relay

  • Malfunction Duration:

    Approximately 60 seconds

  • Wire harness or connector

  • Electric parking brake switch assembly

  • Parking brake ECU assembly

 Yes An electric parking brake system malfunction is displayed on the multi-information display.
DTC Detection Condition Combination Table: C13A1
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition Electric parking brake switch assembly is operated to lock side with power switch off ○ -
Power switch on (IG) - ○
Malfunction Status Short in parking brake ECU assembly internal power source relay ○ ○
Detection Time Approximately 60 seconds Approximately 60 seconds
Trip Count 1 trip 1 trip

Tech Tips

If the conditions match either of these patterns, a DTC will be output.

WIRING DIAGRAM

B004SAJE05

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • The electric parking brake may still operate up to 20 seconds after the power switch is turned off. Before disconnecting connectors or fuses, turn the power switch off and wait 20 seconds or more.

  • If the parking brake ECU assembly is replaced, perform the "Reset Memory" and "Acquire Tension Sensor Zero Point" procedures

    Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - IG POWER SOURCE CIRCUIT)


    1. Turn the power switch off.

    2. Disconnect the parking brake ECU assembly connector.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      L77-4 (IG) - Body ground Power switch off Below 2.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR IG POWER SOURCE CIRCUIT

    OK

  2. INSPECT ELECTRIC PARKING BRAKE SWITCH ASSEMBLY


    1. Inspect the electric parking brake switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ELECTRIC PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the G43 electric parking brake switch assembly connector.

    3. Disconnect the parking brake ECU assembly connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L77-12 (LCK1) - Body ground Always 10 kΩ or higher
      L77-13 (REL2) - Body ground Always 10 kΩ or higher
      L77-15 (LCK2) - Body ground Always 10 kΩ or higher
      L77-16 (REL1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR